It's a tool. It's how you use it that counts.
I usually shop at the supermarket in person, but I live alone, so I'm glad of the option to order food online.
I received a postcard from a friend in the post this morning, and I sent one to a friend earlier in the week (though at £1.85 for just a postcard to the EU, it turns out my love for him does has a price, and he probably won't be getting another one.) I still write real letters, and send emails and WhatsApp and Facebook messages, often all to the same people.
I book all sorts of travel and tickets online. Yes, I could do that in person/via a travel agent/on the phone, but it's easier to do in the evening when I'm not working, can compare different sites and places and so on.
I look up a million facts online - definitions and etymology of words, places on maps, dates, history of buildings, machines, biographies, wildlife, garden plants, and a million other things. I could do all that in libraries etc, especially as i worked in libraries for some years, but it's a lot easier online.
And I can connect to friends all over the place. Last night, I had a couple of messages from a childhood friend who now lives in NZ, and another in the Netherlands, not to mention various parts of the UK. I'm back in touch with my childhood penfriend in Malaysia because of Facebook. I'd probably still be in touch with a lot of people whom I know one (I was always a great letter writer,) but not all of them, and not as frequently. I am on FB, but I don't often post pictures and I'm not on it all the time (not installed on my phone.) I can't be bothered with Instagram, twitter, Snapchat or others. There may be some things I miss out on, but so be it.
Also, if we turned off the Internet, I'd probably have to get a different job, as it's a large part of what my employer does. I don't think it would be helpful to put so many people out of work in the current economic climate.